Unknown Facts About The World’s Most Iconic Landmarks That Tourists Don’t Ever Notice

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3. The Great Wall of China

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At 13,170.70 miles long, the Great Wall spans half the length of the equator and it’s even been rumoured that it can be seen from space. Considering it took more than 2,000 years to build, it’s no surprise that the Great Wall remains the world’s most significant feat of human engineering.

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